Huang Zhihua, Wei Xiaofeng, Li Mingzhong, Wang Jianjun, Lin Honghuan, Xu Dangpeng, Deng Ying, Zhang Rui
Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China.
Appl Opt. 2012 Apr 1;51(10):1546-51. doi: 10.1364/AO.51.001546.
Coherent and incoherent combination of Gaussian beams employing a lens array distributed on the spherical chamber is theoretically analyzed. The output field of each source in the array is coupled through an individual optical system whose local optical axis coincides with the radial direction of the chamber. The resulting intensity profile near the origin is derived. The intensity profile and power in the bucket on the target for rectangular and hexagonal arrangement are numerically calculated. The influences of the center-to-center separation and the ring number of the focusing lens array are given. The synthetic intensity profile of incoherent combination changes little for a lens array scale much smaller than the chamber size. In contrast, the synthetic intensity profile of coherent combination shows an interference pattern with a sharp central peak and sidelobes.
对采用分布在球形腔上的透镜阵列的高斯光束的相干和非相干组合进行了理论分析。阵列中每个光源的输出场通过一个单独的光学系统进行耦合，该光学系统的局部光轴与腔的径向方向一致。推导了原点附近的合成强度分布。对矩形和六边形排列的目标上的桶中强度分布和功率进行了数值计算。给出了聚焦透镜阵列的中心距和环数的影响。对于比腔尺寸小得多的透镜阵列尺度，非相干组合的合成强度分布变化很小。相比之下，相干组合的合成强度分布呈现出具有尖锐中心峰值和旁瓣的干涉图样。
